Update and fix TOTP

fix - added this in every button event switch:
default:
                    break;

applications/plugins/totp/services/nullable/nullable.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define TOTP_NULLABLE_STRUCT(value_type)       \
+    typedef struct TotpNullable_##value_type { \
+        bool is_null;                          \
+        value_type value;                      \
+    } TotpNullable_##value_type
+
+#define TOTP_NULLABLE_NULL(s) s.is_null = true
+#define TOTP_NULLABLE_VALUE(s, v) \
+    s.is_null = false;            \
+    s.value = v
+
+TOTP_NULLABLE_STRUCT(uint16_t);